They don't have multi-gas capability? I used to use Cochran computers many years ago but haven't used one in over 15 years.
They do, but it is pre-programmed auto switching, so it really is "plan the dive, dive the plan". I just used it for single gas, and is great that way. Actually, the wife really likes it as it is very readable, and can also be console mounted (yuck! - but what she likes)
YMMV